HP 7044A X-Y Recorder Restoration
Published on Sun, Jul 21st 2024 Science & Technology Rectangular HD
It takes another long video full of analog goodness to repair this X-Y recorder beauty, because we end up fixing it twice! We also rejuvenate the pens while we are at it, also using two different methods.
HP 7044B and 7045B Service Manual: https://archive.org/details/hp-7044-b-7045-b-x-y-recorder-operations-and-service-manual-07044-90006-nov.-1980
Stuff that supports the channel:
- Support us on Patreon: https://www.patreon.com/curiousmarc
- Amazon links for the tools I use in the lab: https://www.curiousmarc.com/amazon-links
- Channel merch on Fourthwall: https://curiousmarc-shop.fourthwall.com
- Legacy channel merch on Teespring (I don't have everything transferred to Fourthwall yet): https://teespring.com/stores/curiousmarcs-store
"Elevator Music" Credit: Crinoline Dreams by Kevin MacLeod
Our lovely sponsors
- PCBWay: fast turn PCBs, https://www.pcbway.com
- Electro-Rent: https://www.electrorent.com
- Keysight: test instruments: https://www.keysight.com
- Samtec: connectors: https://www.samtec.com
- R&D Microwaves: https://rdmicrowaves.com
Get more technical info on the companion site: https://www.curiousmarc.com
Contact info: https://www.youtube.com/curiousmarc/about
00:00 Intro, previous HP 7035B restoration
01:06 Inspection and first try
02:42 Disassembly, slide cleaning and platen repair
06:44 A power supply fault?
08:44 X-axis fix
09:30 Y power supply debug and fix
13:07 Y-axis still fails!
13:42 Servo circuits (with elevator music)
18:18 Y servo circuit debug
21:01 It self heals, then self breaks!
22:10 Bad op-amp?
24:55 Root cause, repair, and calibration
28:28 Restoring the pens
32:24 It breaks again!
34:02 Second repair
37:59 Laser L-I curve plot demo
General statistics
- Total
-
35,917
- Total
-
xxx.xx
- Total
-
xxx.xx
- Total
-
00:41:54
Metadata
Topics
Videolists
No videolist for this video.
Content
No format for this video.
Public statistics
Private statistics
Watch time
This widget is only available to channel's owner.
Sign inSubscribers gained
This widget is only available to channel's owner.
Sign inShares
This widget is only available to channel's owner.
Sign inEstimated demography
This widget is only available to channel's owner.
Sign inEstimated audience
This widget is only available to channel's owner.
Sign in